Glazing area differences

Shane Regan — Mon, 24 Aug 2020 09:13:48 GMT

Current Revision posted to Hevacomp Wiki by Shane Regan on 8/24/2020 9:13:48 AM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

For a Notional building, the area of glazing is not acquired from the area defined in the Actual building, but is defined through the NCM Database using the activity class of the glazing type and modified accordingly to match area percentages based on a standard building type.

From the NCM modeling guide:

"In the Notional building the activity assigned to each zone determines whether the zone will have windows, rooflights or no glazing at all, regardless of the type of glazing applied to the equivalent zone in the Actual building. The glazing class assigned to each NCM activity is determined in the "activity" table from the NCM activity database"

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

For example, an office activity is classified as Side-lit, so the Notional building will only consider Windows for this space. Any rooflights defined in the space in the Actual building will be ignored and the total glazing are will be defined as 40% of exposed façade area or 1.5 x full façade width.

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

36. The areas of windows, doors and rooflights in the Notional building must be determined as set out in the following sub-paragraphs and must also conform to the measurement conventions set out in the guidance beginning at paragraph 183.

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

e. For DSM software the shape of windows in side-lit activities should be modeled as a full façade width window with sill height of 1.1m. Where doors have been copied across from the Actual building, the window will occupy the remaining façade width, and the height adjusted such that the total area of opening areas still satisfies Table 3.

37. Display windows in the Actual building are not copied across to the Notional building

39. No glazed area should be included in basements. In semi-basements (i.e. where the wall of the basement space is mainly below ground level but part is above ground), the opening areas in Table 3 must apply to the above ground part (note that in such situations the 1.1m sill height rule would not need to be followed), with zero glazing for the below ground part.

Tags: SBEM, Hevacomp Mechanical Designer, Glazing Areas, PartL

Glazing area differences

Duncan Brown — Wed, 02 Nov 2016 17:31:15 GMT

Revision 17 posted to Hevacomp Wiki by Duncan Brown on 11/2/2016 5:31:15 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

Tags: SBEM, Hevacomp Mechanical Designer, Glazing Areas, PartL

Glazing area differences

Duncan Brown — Wed, 02 Nov 2016 17:30:34 GMT

Revision 16 posted to Hevacomp Wiki by Duncan Brown on 11/2/2016 5:30:34 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

Tags: SBEM, Hevacomp Mechanical Designer, Glazing Areas, PartL

Glazing area differences

Duncan Brown — Wed, 02 Nov 2016 17:29:36 GMT

Revision 15 posted to Hevacomp Wiki by Duncan Brown on 11/2/2016 5:29:36 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

Tags: SBEM, Hevacomp Mechanical Designer, Glazing Areas, PartL

Glazing area differences

Duncan Brown — Wed, 02 Nov 2016 17:28:01 GMT

Revision 14 posted to Hevacomp Wiki by Duncan Brown on 11/2/2016 5:28:01 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

Tags: SBEM, Hevacomp Mechanical Designer, Glazing Areas, PartL

Glazing area differences

Duncan Brown — Wed, 02 Nov 2016 17:26:20 GMT

Revision 13 posted to Hevacomp Wiki by Duncan Brown on 11/2/2016 5:26:20 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

Tags: SBEM, Hevacomp Mechanical Designer, Glazing Areas, PartL

Glazing area differences

Duncan Brown — Wed, 02 Nov 2016 17:25:39 GMT

Revision 12 posted to Hevacomp Wiki by Duncan Brown on 11/2/2016 5:25:39 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Glazing area differences

Duncan Brown — Wed, 02 Nov 2016 17:25:07 GMT

Revision 11 posted to Hevacomp Wiki by Duncan Brown on 11/2/2016 5:25:07 PM

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i (N/A)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Glazing area differences

Stephen Brown — Tue, 17 Mar 2015 11:37:21 GMT

Revision 10 posted to Hevacomp Wiki by Stephen Brown on 3/17/2015 11:37:21 AM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

For an important note on the PartL calculation, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Glazing area differences

Duncan Brown — Fri, 12 Dec 2014 11:40:48 GMT

Revision 9 posted to Hevacomp Wiki by Duncan Brown on 12/12/2014 11:40:48 AM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

For an important note on the PartL calculation, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Glazing area differences

Duncan Brown — Tue, 28 Oct 2014 16:13:54 GMT

Revision 8 posted to Hevacomp Wiki by Duncan Brown on 10/28/2014 4:13:54 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

For an important note on the PartL calculation, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Glazing area differences

Duncan Brown — Tue, 28 Oct 2014 16:12:50 GMT

Revision 7 posted to Hevacomp Wiki by Duncan Brown on 10/28/2014 4:12:50 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

For an important note on the PartL calculation, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Glazing area differences

Duncan Brown — Tue, 28 Oct 2014 16:12:20 GMT

Revision 6 posted to Hevacomp Wiki by Duncan Brown on 10/28/2014 4:12:20 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

For an important note on the PartL calculation, please click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Glazing area differences

Duncan Brown — Tue, 28 Oct 2014 16:09:58 GMT

Revision 5 posted to Hevacomp Wiki by Duncan Brown on 10/28/2014 4:09:58 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The SBEM engine can adjust glazing areas in Notional buildings so they may not reflect your inputted data.

Method

From the NCM modeling guide:

TABLE 3 Glazing in the Notional building

Activity glazing class	Glazing area (glass + frame)	g-value (EN ISO 410)	Frame factor	Visible light transmittance
Side-lit	Exposed facades will have windows with area that is the lesser of either 1.5m high x full façade width OR 40% of exposed façade area	0.40	10%	71%
Roof-lit	12% of exposed roof areas will be made up of rooflights	0.43	15%	67%
No-lit	No windows or rooflights	n/a	n/a	n/a

The NCM modeling guide sets out the following conditions for windows, doors and rooflights in the Notional Building:

Areas of windows, doors and rooflights:

a. Copy the areas of high usage entrance, pedestrian, and vehicle access doors that exist in the corresponding element of the Actual building.

b. In the Notional building, high usage entrance, pedestrian, and vehicle access doors must be taken as being opaque (i.e. with zero glazing) and use the U-values from Table 1

c. If the total area of these elements is less than the appropriate allowance for glazing from Table 3, the balance must be made up of windows or roof lights as appropriate.

d. If the total area of the copied elements exceeds the allowance for glazing from Table 3, the copied areas must be retained but no windows or roof lights added.

37. Display windows in the Actual building are not copied across to the Notional building

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Glazing area differences

Elisabeth Pry — Wed, 26 Jun 2013 19:52:39 GMT

Revision 4 posted to Hevacomp Wiki by Elisabeth Pry on 6/26/2013 7:52:39 PM


	Applies To

	Product(s):	Hevacomp Mechanical Designer
	Version(s):	V8i
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A
	Original Author:	Bentley Technical Support Group

Overview

The SBEM engine can adjust glazing areas in buildings so they may not reflect your inputted data. For more information, please click the link below.

Method

To see how glazing areas can change, click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Tags: SELECTservices, Hevacomp Mechanical Designer, TechNote

Glazing area differences

Duncan Brown — Tue, 17 Jul 2012 09:17:37 GMT

Revision 3 posted to Hevacomp Wiki by Duncan Brown on 7/17/2012 9:17:37 AM

Document Information

Document Type: TechNote

Product(s): Hevacomp Mechanical Designer

Version(s): V8i

Original Author: Bentley Technical Support Group

Overview

The SBEM engine can adjust glazing areas in buildings so they may not reflect your inputted data. For more information, please click the link below.

Method

To see how glazing areas can change, click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Part L - Glazing area differences [TN]

Duncan Brown — Mon, 16 Jul 2012 13:30:59 GMT

Revision 2 posted to Hevacomp Wiki by Duncan Brown on 7/16/2012 1:30:59 PM

Document Information

Document Type: TechNote

Product(s): Hevacomp Mechanical Designer

Version(s): V8i

Original Author: Bentley Technical Support Group

Overview

The SBEM engine can adjust glazing areas in buildings so they may not reflect your inputted data. For more information, please click the link below.

Method

To see how glazing areas can change, click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Part L - Glazing area differences

Duncan Brown — Mon, 11 Jul 2011 11:53:43 GMT

Revision 1 posted to Hevacomp Wiki by Duncan Brown on 7/11/2011 11:53:43 AM

Document Information

Document Type: TechNote

Product(s): Hevacomp Mechanical Designer

Version(s): V8i

Original Author: Bentley Technical Support Group

Overview

The SBEM engine can adjust glazing areas in buildings so they may not reflect your inputted data. For more information, please click the link below.

Method

To see how glazing areas can change, click here

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

Comments or Corrections?

Bentley's Technical Support Group requests that you please confine any comments you have on this Wiki entry to this "Comments or Corrections?" section. THANK YOU!

Glazing area differences

Glazing area differences

Overview

Method

Glazing area differences

Overview

Method

Glazing area differences

Overview

Method

Glazing area differences

Overview

Method

Glazing area differences

Overview

Method

Glazing area differences

Overview

Method

Glazing area differences

Overview

Method

Glazing area differences

Overview

Method

Glazing area differences

Overview

Method

See Also

External Links

Comments or Corrections?

Glazing area differences

Overview

Method

See Also

External Links

Comments or Corrections?

Glazing area differences

Overview

Method

See Also

External Links

Comments or Corrections?

Glazing area differences

Overview

Method

See Also

External Links

Comments or Corrections?

Glazing area differences

Overview

Method

See Also

External Links

Comments or Corrections?

Glazing area differences

Overview

Method

See Also

External Links

Comments or Corrections?

Glazing area differences

Overview

Method

See Also

External Links

Comments or Corrections?

Glazing area differences

Document Information

Overview

Method

See Also

External Links

Comments or Corrections?

Part L - Glazing area differences [TN]

Document Information

Overview

Method

See Also

External Links